JP2010099698A - Mold cooling apparatus - Google Patents

Mold cooling apparatus Download PDF

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Publication number
JP2010099698A
JP2010099698A JP2008273366A JP2008273366A JP2010099698A JP 2010099698 A JP2010099698 A JP 2010099698A JP 2008273366 A JP2008273366 A JP 2008273366A JP 2008273366 A JP2008273366 A JP 2008273366A JP 2010099698 A JP2010099698 A JP 2010099698A
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water
air
pipe
cooling
mold
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Gen Morikawa
巖 森川
Kazuto Shibata
和人 柴田
Koji Isero
考史 伊勢呂
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DIE ENGINEERING KK
Aisin Keikinzoku Co Ltd
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DIE ENGINEERING KK
Aisin Keikinzoku Co Ltd
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Priority to JP2008273366A priority Critical patent/JP2010099698A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a mold cooling apparatus which has a high cooling capability, can easily control the temperature of the mold, and can detect abnormal cooling in the mold. <P>SOLUTION: The mold cooling apparatus supplies water and air into a cooling part 1 provided in a mold A and includes a water supplying pipe 2, an air supplying pipe 3, a confluent part 4 at which the water supplying pipe 2 and the air supplying pipe 3 meet together, a water supply pipe 5 that connects the confluent part 4 to the cooling part 1, and a drainage pipe 7 that discharges water and air from the cooling part 1. A part at the intermediate position of the water supply pipe 5 is configured as a storage pipe 6 having a large sectional area. The sectional area of the storage pipe 6 is 2.5 to 4 times as large as that of the water supply pipe 5 located on the upstream side of the storage pipe 6. The length of the storage pipe 6 is 550 to 750 mm. After the storage of water in the storage pipe 6, air is pressure-fed, and water is first jetted into the cooling part 1, followed by jetting of a mixed fluid composed of water and air. Thereafter, water and air are alternately supplied, and the mixed fluid composed of water and air is jetted a plurality of times. A pressure meter 8 is provided at the intermediate position of the drainage pipe 7 to measure the pressure within the drainage pipe 7 and to detect abnormal jetting of water and the mixed fluid composed of water and air. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、金型に設けた冷却部に水とエアを供給する金型冷却装置に関する。   The present invention relates to a mold cooling apparatus that supplies water and air to a cooling unit provided in a mold.

ダイカスト鋳造においては、金型や金型に挿入する鋳抜きピンなどを適切に冷却して温度管理をすることが、製品の高品質化を図るために重要である。冷却の方法としては、金型などに形成した冷却水路に冷却水を供給する方法が一般的であり、たとえば特許文献１や２の装置が提案されている。
文献１の装置は、金型Ａに穿設された冷却穴Ａ１内に冷却水を供給する冷却水供給径路２と、冷却穴Ａ１内の冷却水をエアパージするための高圧エアを送るエアパージ径路３と、両径路２，３を合流させる流体合流部４とを備え、流体合流部４を通して冷却穴Ａ１内に冷却水およびエアを交互に供給することにより金型Ａを冷却する金型冷却装置であって、流体合流部４にクラッキング圧力より低い圧力の冷却水およびエアをそれぞれ冷却水供給径路２とエアパージ径路３内に維持させるチェック弁４ａ，４ｂを組み込むとともに、冷却水供給径路２から流体合流部４を通して冷却水を吐出した後にタイムラグをおいてエアパージ径路３から流体合流部４を通して高圧エアを吐出するものである。
また、文献２の装置は、金型１などに備えられた冷却水路４，５と連通可能に接続される冷却水管路６と、冷却水供給源に接続されかつ冷却水管路６に冷却水を供給する冷却水供給路１１と、加圧エア供給源に接続されかつ冷却水管路６に加圧エアを供給する加圧エア供給路１２とを備え、金型１内への鋳込みに際して予め設定されたタイミングで加圧エアとともに冷却水管路６内の所定量の冷却水を高い圧力で冷却水路４，５内に供給するものである。
特開２００３−１３６１８８号公報 特開２００５−４６８４６号公報 In die-casting, it is important to control the temperature by appropriately cooling a die or a die pin inserted into the die in order to improve the quality of the product. As a cooling method, a method of supplying cooling water to a cooling water channel formed in a mold or the like is generally used. For example, devices of Patent Documents 1 and 2 have been proposed.
The apparatus of Document 1 includes a cooling water supply path 2 for supplying cooling water into a cooling hole A1 formed in a mold A, and an air purge path 3 for sending high-pressure air for air purging the cooling water in the cooling hole A1. And a fluid merging section 4 that merges both the paths 2 and 3, and a mold cooling device that cools the mold A by alternately supplying cooling water and air into the cooling hole A1 through the fluid merging section 4. In addition, check valves 4a and 4b for maintaining cooling water and air having a pressure lower than the cracking pressure in the cooling water supply path 2 and the air purge path 3 are incorporated in the fluid merging section 4 and fluid merging from the cooling water supply path 2 After discharging cooling water through the part 4, high-pressure air is discharged from the air purge path 3 through the fluid merging part 4 with a time lag.
The apparatus of Document 2 includes a cooling water pipe 6 connected to the cooling water paths 4 and 5 provided in the mold 1 and the like, a cooling water pipe 6 connected to a cooling water supply source, and supplying cooling water to the cooling water pipe 6. A cooling water supply path 11 to be supplied and a pressurized air supply path 12 connected to a pressurized air supply source and supplying pressurized air to the cooling water pipe 6 are set in advance when casting into the mold 1. A predetermined amount of cooling water in the cooling water pipe 6 is supplied into the cooling water paths 4 and 5 at a high pressure together with the pressurized air.
JP 2003-136188 A JP 2005-46846 A

しかしながら、文献１の装置においては、冷却水として高圧水吐出ポンプ１ｂで増圧した水を使用し、また、冷却水の圧送を止めた後に高圧エアを送るので、冷却水マニホールド５やホース６ａ、往復式冷却管６ｃの水が金型Ａの冷却穴Ａ１に高圧で噴出され、金型Ａが冷えすぎてしまう。
また、文献２の装置は、冷却水が加圧エアとともに供給されるので、高い冷却能力を有するが、設定温度付近で金型の温度を微調整することは困難であると考えられる。
さらに、いずれの装置においても、小径の冷却管を備える鋳抜きピンなどを冷却しようとする場合、冷却管内に錆や水垢などが詰まり、冷却できないまま鋳造してしまうおそれがある。 However, in the apparatus of Document 1, since the water increased in pressure by the high-pressure water discharge pump 1b is used as the cooling water, and the high-pressure air is sent after stopping the pumping of the cooling water, the cooling water manifold 5 and the hose 6a, The water in the reciprocating cooling pipe 6c is ejected at a high pressure into the cooling hole A1 of the mold A, and the mold A becomes too cold.
Further, the apparatus of Document 2 has a high cooling capacity because the cooling water is supplied together with the pressurized air, but it is considered difficult to finely adjust the temperature of the mold near the set temperature.
Furthermore, in any of the apparatuses, when trying to cool a cored pin or the like having a small-diameter cooling pipe, there is a risk that the cooling pipe is clogged with rust or scales and cast without being cooled.

本発明は、上記事情を鑑みたものであり、高い冷却能力を有し、かつ容易に金型温度を制御でき、さらに金型の冷却異常を検出できる金型冷却装置を提供することを目的とする。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a mold cooling apparatus that has a high cooling capacity, can easily control the mold temperature, and can detect abnormal cooling of the mold. To do.

本発明のうち請求項１の発明は、金型に設けた冷却部に水とエアを供給する金型冷却装置であって、水供給管と、エア供給管と、両供給管が合流する合流部と、該合流部と前記冷却部とを接続する給水管と、前記冷却部から水とエアを排出する排水管とを備え、前記給水管の途中一部を断面積の大きな貯留管としてあり、該貯留管の断面積が、上流側の前記給水管の断面積の２．５倍〜４倍であり、前記水供給管から水を供給して前記貯留管に水を貯留後、前記エア供給管からエアを圧送して、初めに前記給水管と前記貯留管の水を前記冷却部に噴出させ、その後水とエアの混合流体を噴出させることを特徴とする。   The invention according to claim 1 of the present invention is a mold cooling device for supplying water and air to a cooling section provided in a mold, wherein the water supply pipe, the air supply pipe, and the two supply pipes merge. And a water supply pipe connecting the merging part and the cooling part, and a drain pipe for discharging water and air from the cooling part, a part of the water supply pipe being a storage pipe having a large cross-sectional area The cross-sectional area of the storage pipe is 2.5 to 4 times the cross-sectional area of the water supply pipe on the upstream side, and after supplying water from the water supply pipe and storing water in the storage pipe, the air Air is pumped from a supply pipe, and water in the water supply pipe and the storage pipe is first ejected to the cooling section, and then a mixed fluid of water and air is ejected.

本発明のうち請求項２の発明は、前記貯留管の長さが５５０ｍｍ〜７５０ｍｍであることを特徴とする。   The invention of claim 2 among the present invention is characterized in that the length of the storage tube is 550 mm to 750 mm.

本発明のうち請求項３の発明は、水を前記冷却部に噴出させ、その後水とエアの混合流体を噴出させた後、さらに前記水供給管および前記エア供給管から水とエアを交互に供給して水とエアの混合流体を複数回噴出させることを特徴とする。   According to a third aspect of the present invention, water and air are alternately ejected from the water supply pipe and the air supply pipe after water is jetted to the cooling section and then a mixed fluid of water and air is jetted. It is characterized in that a mixed fluid of water and air is ejected a plurality of times by supplying.

本発明のうち請求項４の発明は、前記排水管の途中に圧力計が設けてあり、水を前記冷却部に噴出させ、その後水とエアの混合流体の噴出が終了する前に、前記排水管内の圧力を測定し、水および水とエアの混合流体の噴出異常を検出することを特徴とする。   According to a fourth aspect of the present invention, a pressure gauge is provided in the middle of the drain pipe, and water is ejected to the cooling unit, and then the drainage of the mixed fluid of water and air ends. The pressure in the pipe is measured, and abnormal ejection of water and a mixed fluid of water and air is detected.

本発明のうち請求項１の発明によれば、貯留管の断面積を上流側の給水管の断面積の２．５倍〜４倍にして、貯留管に水を貯留後、エアを供給することで、初めは水が冷却部に噴出し、その後水とエアの混合流体が噴出する。当初は貯留管に貯留された水がエアに押し出されるが、その後は、給水管に対して貯留管が広くなっていることで供給されたエアによって撹拌された水が噴出するのである。これにより、金型の冷却初期は水により設定温度近くまで急冷し、その後水とエアの混合流体により設定温度まで徐冷することができ、金型の温度を容易に制御できる。   According to the first aspect of the present invention, the cross-sectional area of the storage pipe is made 2.5 to 4 times the cross-sectional area of the upstream water supply pipe, and water is stored in the storage pipe and then air is supplied. Thus, water is first ejected to the cooling section, and then a mixed fluid of water and air is ejected. Initially, the water stored in the storage pipe is pushed out to the air, but thereafter, the water agitated by the supplied air is ejected because the storage pipe is wide with respect to the water supply pipe. Thereby, at the initial stage of cooling the mold, it can be rapidly cooled to near the set temperature with water, and then gradually cooled to the set temperature with a mixed fluid of water and air, and the temperature of the mold can be easily controlled.

本発明のうち請求項２の発明によれば、貯留管の長さを５５０ｍｍ〜７５０ｍｍとすることで、装置を大型化することなく、金型を冷却するために十分な量の水を貯留することができる。貯留管が長すぎると、装置全体が大型化してしまい、短すぎると、水の噴出時間が短くなって冷却能力が不足してしまう。   According to the second aspect of the present invention, by setting the length of the storage tube to 550 mm to 750 mm, a sufficient amount of water is stored to cool the mold without increasing the size of the apparatus. be able to. If the storage pipe is too long, the entire apparatus becomes large, and if it is too short, the water ejection time is shortened and the cooling capacity is insufficient.

本発明のうち請求項３の発明によれば、金型の形状や大きさなどの条件によって適宜水とエアの混合流体を噴出することで、さらに安定して金型の温度を制御できる。   According to the third aspect of the present invention, the temperature of the mold can be controlled more stably by appropriately ejecting a mixed fluid of water and air according to conditions such as the shape and size of the mold.

本発明のうち請求項４の発明によれば、排水管内の圧力測定により、水および水とエアの混合流体の噴出異常を検出できるので、冷却水の経路に錆や水垢などが詰まって冷却水が流れにくくなり、冷却不足のまま鋳造が行われることを防止し、製品の高品質化を図ることができる。   According to the invention of the fourth aspect of the present invention, since an abnormal ejection of water and a mixed fluid of water and air can be detected by measuring the pressure in the drain pipe, the cooling water path is clogged with rust and scale, and the cooling water Is difficult to flow, and it is possible to prevent the casting from being performed with insufficient cooling and to improve the quality of the product.

本発明の金型冷却装置の具体的な構成について、各図面に基づいて説明する。図１は、金型冷却装置の全体図であり、本装置は、水を供給する水供給源およびエアを供給するエア供給源に接続して使用するものである。水供給源には水用カプラ２１が接続してあり、その下流には不純物を除去するためのストレーナ２２を介して水用マニホールド２３が接続してある。一方、エア供給源にはエア用カプラ３１が接続してあり、その下流にはエア用マニホールド３３が接続してある。水用マニホールド２３からは三本の水供給管２が延びており、エア用マニホールド３３からは三本のエア供給管３が延びているが、各水供給管同士、各エア供給管同士は互いに同等のものなので、以下においては特に断らない限り、それぞれの中の一本のみについて言及する。水供給管２には、水用ソレノイド弁２４が接続してあり、エア供給管３には、エア用ソレノイド弁３４が接続してある。そして、水供給管２とエア供給管３とは、各ソレノイド弁２４，３４の下流側に接続した合流部４において合流している。
合流部４の下流側には給水管５が接続してある。給水管５の下流側には金型Ａに設けた冷却部１が接続してあり、冷却部１に水やエアを供給する。冷却部１の詳細は後述する。そして、給水管５の途中一部が、断面積の大きな貯留管６としてある。貯留管６の断面積は、その上流側の給水管５の断面積の２．５倍〜４倍とすることが望ましく、本実施例においては、上流側の給水管５の内径を５ｍｍ、貯留管６の内径を８ｍｍとした（貯留管６の断面積は給水管５の断面積の２．５６倍となる）。冷却部１には、水やエアを排出するための排水管７が接続してあり、さらにこの排水管７の途中に圧力計８が取り付けてある。
なお、水用マニホールド２３には給水圧力計２５および給水温度計２６が接続してあり、エア用マニホールド３３には、エア圧力計３５が接続してある。また、水用マニホールド２３およびエア用マニホールド３３から貯留管６上流側の給水管５までは筐体４１の中に納めてあり、圧力計８、給水圧力計２５、給水温度計２６およびエア圧力計３５は筐体４１の側面に取り付けてある。 A specific configuration of the mold cooling apparatus of the present invention will be described with reference to the drawings. FIG. 1 is an overall view of a mold cooling apparatus. This apparatus is used by being connected to a water supply source for supplying water and an air supply source for supplying air. A water coupler 21 is connected to the water supply source, and a water manifold 23 is connected downstream of the water supply source via a strainer 22 for removing impurities. On the other hand, an air coupler 31 is connected to the air supply source, and an air manifold 33 is connected downstream thereof. Three water supply pipes 2 extend from the water manifold 23, and three air supply pipes 3 extend from the air manifold 33. The water supply pipes and the air supply pipes are mutually connected. Since they are equivalent, only one of them will be mentioned in the following unless otherwise specified. A water solenoid valve 24 is connected to the water supply pipe 2, and an air solenoid valve 34 is connected to the air supply pipe 3. The water supply pipe 2 and the air supply pipe 3 merge at the junction 4 connected to the downstream side of the solenoid valves 24 and 34.
A water supply pipe 5 is connected to the downstream side of the junction 4. A cooling unit 1 provided in the mold A is connected to the downstream side of the water supply pipe 5 to supply water and air to the cooling unit 1. Details of the cooling unit 1 will be described later. A part of the water supply pipe 5 is a storage pipe 6 having a large cross-sectional area. The cross-sectional area of the storage pipe 6 is preferably 2.5 to 4 times the cross-sectional area of the upstream water supply pipe 5, and in this embodiment, the internal diameter of the upstream water supply pipe 5 is 5 mm. The inner diameter of the pipe 6 was 8 mm (the cross-sectional area of the storage pipe 6 is 2.56 times the cross-sectional area of the water supply pipe 5). A drain pipe 7 for discharging water and air is connected to the cooling unit 1, and a pressure gauge 8 is attached in the middle of the drain pipe 7.
A water supply pressure gauge 25 and a water supply thermometer 26 are connected to the water manifold 23, and an air pressure gauge 35 is connected to the air manifold 33. Further, the water manifold 23 and the air manifold 33 to the water supply pipe 5 upstream of the storage pipe 6 are housed in a casing 41. The pressure gauge 8, the water supply pressure gauge 25, the water supply thermometer 26, and the air pressure gauge Reference numeral 35 denotes a side surface of the housing 41.

次に、給水管５と貯留管６との接続部分について、図２に基づき説明する。合流部から延びる給水管５にソケット２７が接続されている。ソケット２７は筐体４１に形成した孔に嵌め込まれており、筐体４１の外側からＬ字継手２８が螺合されている。そして、Ｌ字継手２８の下流側端部に貯留管６が接続されており、給水管５と貯留管６とが連通する。貯留管６の下流側端部と給水管５との接続部分についても同様である。   Next, the connection part of the water supply pipe 5 and the storage pipe 6 is demonstrated based on FIG. A socket 27 is connected to the water supply pipe 5 extending from the junction. The socket 27 is fitted in a hole formed in the housing 41, and an L-shaped joint 28 is screwed from the outside of the housing 41. And the storage pipe 6 is connected to the downstream end part of the L-shaped joint 28, and the water supply pipe 5 and the storage pipe 6 communicate. The same applies to the connecting portion between the downstream end of the storage pipe 6 and the water supply pipe 5.

次に、金型Ａに設けた冷却部１について、図３に基づき説明する。金型Ａは、金型固定中子ａ１と金型可動中子ａ２とを備え、両者の間に溶融金属を流し込むキャビティａ３が形成されており、冷却部１は、金型固定中子ａ１に形成した孔に挿入した鋳抜きピン１１と、鋳抜きピン１１の中心軸上に形成した冷却穴１２と、冷却穴１２に挿入した冷却管１３とを有する。冷却穴１２は鋳抜きピン１１の一端から他端近傍まで達するものであり、冷却管１３は冷却穴１２の底部近傍まで延びている。そして、給水管５が冷却管１３と連通しており、排水管７が冷却穴１２と連通している。給水管５から供給される水やエアは、冷却管１３の中を通り、その先端から吐出されて冷却穴１２（冷却管１３の外側）を通って排水管７に排出される。この際、水やエアは熱せられた鋳抜きピン１１と熱交換をして、鋳抜きピン１１を冷却する。なお、図３（ａ）〜（ｃ）に三種類の冷却部１を示したように、鋳抜きピン１１には種々の長さ・太さのものがあり、その長さによって冷却管１３の長さも異なる。   Next, the cooling unit 1 provided in the mold A will be described with reference to FIG. The mold A includes a mold-fixed core a1 and a mold-movable core a2, and a cavity a3 into which molten metal is poured is formed therebetween. The cooling unit 1 is connected to the mold-fixed core a1. It has a core pin 11 inserted into the formed hole, a cooling hole 12 formed on the central axis of the core pin 11, and a cooling pipe 13 inserted into the cooling hole 12. The cooling hole 12 extends from one end of the core pin 11 to the vicinity of the other end, and the cooling pipe 13 extends to the vicinity of the bottom of the cooling hole 12. The water supply pipe 5 communicates with the cooling pipe 13, and the drain pipe 7 communicates with the cooling hole 12. Water or air supplied from the water supply pipe 5 passes through the cooling pipe 13, is discharged from the tip, and is discharged to the drain pipe 7 through the cooling hole 12 (outside the cooling pipe 13). At this time, water or air exchanges heat with the heated core pin 11 to cool the core pin 11. As shown in FIGS. 3A to 3C, the three types of cooling section 1 are shown. The cast pin 11 has various lengths and thicknesses, and the length of the cooling pipe 13 depends on the length. The length is also different.

次に、本装置により金型を冷却する際の動作について説明する。水供給源から供給される冷却水は、水用カプラ２１からストレーナ２２を介して水用マニホールド２３を通り、水用ソレノイド弁２４に到達する。ダイカストマシンの金型閉め信号を金型冷却装置が受けると、水用ソレノイド弁２４が０．７秒間開き、冷却水は給水管５を通り、貯留管６に貯留される。一方、エア供給源から供給されるエアは、エア用カプラ３１からエア用マニホールド３３を通り、エア用ソレノイド弁３４に到達する。ダイカストマシンの射出スタート信号を金型冷却装置が受けると、エア用ソレノイド弁３４が１４．５秒間開き、初めは貯留管６から水が押し出されて約５秒間噴出し、その後水とエアの混合流体が約９．５秒間噴出し、給水管５を通り冷却管１３から鋳抜きピン１１の冷却穴１２に供給される。鋳抜きピン１１の冷却穴１２内壁に噴出した水および水とエアの混合流体は、熱せられた鋳抜きピン１１と熱交換をして鋳抜きピン１１を冷却し、排水管７を通って排出される。排水管７の途中に設けた圧力計８により、エア用ソレノイド弁３４が開いてから１３．５秒経過時に圧力を測定し、水と、水とエアの噴出異常を検出・確認する。エアの供給完了後、水用ソレノイド弁２４を０．１秒間開き、その後エア用ソレノイド弁３４を３秒間開く動作を５回繰り返し、水とエアの混合流体を噴出して鋳抜きピン１１を冷却する。このようにすることで、たとえば鋳抜きピン１１の設定温度を１２５度とすれば、最初の５秒間で水により１２５度近くまで急冷し、その後の９．５秒間で水とエアの混合流体により１２５度まで徐冷し、さらにその後水とエアの混合流体を繰り返し噴出することで容易に温度を１２５度に保つよう制御できる。なお、上記の水用ソレノイド弁２４およびエア用ソレノイド弁３４の開時間や、開閉の繰り返し回数は、一例に過ぎず、冷却対象となる金型の形状・大きさや設定温度などによって適宜増減できる。この際、最初の水用ソレノイド弁２４の開時間を長くして貯留管６に貯留する水の量を多くすると、水の噴出時間は長くなるが、その後の水とエアの混合流体の噴出時間はほぼ一定である。   Next, the operation when the mold is cooled by this apparatus will be described. Cooling water supplied from the water supply source passes through the water manifold 23 via the strainer 22 from the water coupler 21 and reaches the water solenoid valve 24. When the die cooling device receives a die closing signal of the die casting machine, the water solenoid valve 24 opens for 0.7 seconds, and the cooling water passes through the water supply pipe 5 and is stored in the storage pipe 6. On the other hand, the air supplied from the air supply source passes through the air manifold 33 from the air coupler 31 and reaches the air solenoid valve 34. When the die cooling device receives the injection start signal of the die casting machine, the solenoid valve for air 34 opens for 14.5 seconds, and water is first pushed out from the storage pipe 6 and ejected for about 5 seconds, and then water and air are mixed. The fluid is ejected for about 9.5 seconds and is supplied from the cooling pipe 13 to the cooling hole 12 of the core pin 11 through the water supply pipe 5. The water and water / air mixed fluid sprayed to the inner wall of the cooling hole 12 of the core pin 11 exchange heat with the heated core pin 11 to cool the core pin 11 and discharge it through the drain pipe 7. Is done. A pressure gauge 8 provided in the middle of the drain pipe 7 measures the pressure when 13.5 seconds have elapsed after the air solenoid valve 34 is opened, and detects and confirms abnormalities in water and water and air ejection. After the air supply is completed, the operation of opening the water solenoid valve 24 for 0.1 second and then opening the air solenoid valve 34 for 3 seconds is repeated five times, and a mixed fluid of water and air is ejected to cool the core pin 11. To do. In this way, for example, if the set temperature of the core pin 11 is set to 125 degrees, it is rapidly cooled to about 125 degrees with water in the first 5 seconds, and then with a mixed fluid of water and air in the subsequent 9.5 seconds. The temperature can be controlled to be easily maintained at 125 degrees by gradually cooling to 125 degrees and then repeatedly ejecting a mixed fluid of water and air. Note that the opening time of the water solenoid valve 24 and the air solenoid valve 34 and the number of times of opening and closing are only examples, and can be appropriately increased or decreased depending on the shape and size of the mold to be cooled and the set temperature. At this time, if the opening time of the first water solenoid valve 24 is lengthened and the amount of water stored in the storage pipe 6 is increased, the water ejection time becomes longer, but the subsequent ejection time of the mixed fluid of water and air Is almost constant.

ここで、貯留管の断面積および長さについて検討する。図４（ａ）〜（ｃ）は、種々の断面積および長さを有する貯留管を用いて、貯留管に水を貯留する時間（すなわち、最初に水用ソレノイド弁を開く時間）を変化させた場合の、水の噴出時間を示すグラフである。貯留管は、内径が１０ｍｍ、８ｍｍ、６．５ｍｍの三種類、長さが７５０ｍｍ、５５０ｍｍ、３５０ｍｍの三種類で、それらの組み合わせにより計九種類となる。また、貯留管の上流側に接続される給水管５の内径は５ｍｍであり、給水管の断面積に対する貯留管の断面積の倍率では４倍、２．５６倍、１．６９倍の三種類となる。さらに、水圧は０．３５ＭＰａ、エア圧は０．４５ＭＰａとした。
グラフより、貯留管の断面積が大きいほど、また長さが長いほど、そして貯留時間が長いほど、水の噴出時間が長くなることがわかる。上述のとおり、本冷却装置は当初の水の噴出により金型を設定温度近くまで急冷するものであり、噴出時間は冷却対象の条件により定まるものであるが、実際の冷却においては、少なくとも１秒程度は必要であり、この条件を満たすには、貯留時間を０．４秒以上とした上で、貯留管の内径が８ｍｍ以上は必要であることがわかる。また、一般に市販されているこの種の管の内径は１０ｍｍのものが最大であり、それ以上の径のものを使用することは現実的ではない。そして、貯留管の内径を８ｍｍ以上とすれば、長さは５５０ｍｍ以上とすることで、１秒以上の噴出時間が得られることがわかる。なお、長さを７５０ｍｍより長くすると、装置が大型化してしまい好ましくない。
また、図４（ｄ）は、貯留管の断面積と、水とエアの混合流体の噴出時間との関係を示すグラフである。貯留時間が０．４秒以上の範囲では、とくに内径１０ｍｍと８ｍｍの場合に噴出時間のばらつきが少ないことがわかる。本冷却装置は、当初の水の噴出により金型を設定温度近くまで急冷後、混合流体により徐冷するものであるが、当初の急冷の時間を調節して設定温度より一定値だけ高い温度まで冷却すれば、そこから設定温度まで冷却するために要する時間は一定であるから、混合流体の噴出時間は一定であることが望ましく、この点からも貯留管の内径は８ｍｍ〜１０ｍｍとすべきであることがわかる。
以上より、貯留管としては、内径が８ｍｍ〜１０ｍｍ（断面積が給水管の２．５倍〜４倍）、長さが５５０ｍｍ〜７５０ｍｍのものを用いることが望ましい。 Here, the cross-sectional area and length of the storage pipe are examined. 4 (a) to 4 (c) use a storage pipe having various cross-sectional areas and lengths to change the time for storing water in the storage pipe (that is, the time for opening the water solenoid valve first). It is a graph which shows the ejection time of water in the case of. There are three types of storage tubes with an inner diameter of 10 mm, 8 mm, and 6.5 mm, and three types of lengths of 750 mm, 550 mm, and 350 mm. Moreover, the inner diameter of the water supply pipe 5 connected to the upstream side of the storage pipe is 5 mm, and the magnification of the cross-sectional area of the storage pipe with respect to the cross-sectional area of the water supply pipe is four types, 2.56 times, 1.69 times It becomes. Furthermore, the water pressure was 0.35 MPa and the air pressure was 0.45 MPa.
From the graph, it can be seen that the larger the cross-sectional area of the storage pipe, the longer the length, and the longer the storage time, the longer the water ejection time. As described above, the present cooling device rapidly cools the mold to near the set temperature by the initial ejection of water, and the ejection time is determined by the condition of the cooling target, but in actual cooling, it is at least 1 second. In order to satisfy this condition, it is understood that the storage time is 0.4 seconds or more and the inner diameter of the storage tube is 8 mm or more. In addition, the commercially available tube of this type has a maximum inner diameter of 10 mm, and it is not practical to use a tube having a larger diameter. And if the internal diameter of a storage pipe shall be 8 mm or more, it turns out that the ejection time of 1 second or more is obtained by making length into 550 mm or more. If the length is longer than 750 mm, the apparatus becomes undesirably large.
FIG. 4D is a graph showing the relationship between the cross-sectional area of the storage pipe and the ejection time of the mixed fluid of water and air. It can be seen that when the storage time is in the range of 0.4 seconds or more, there is little variation in the ejection time especially when the inner diameter is 10 mm and 8 mm. In this cooling device, the mold is rapidly cooled to near the set temperature by the initial ejection of water, and then gradually cooled by the mixed fluid, but the initial quenching time is adjusted to a temperature higher than the set temperature by a certain value. If it is cooled, the time required for cooling from there to the set temperature is constant. Therefore, it is desirable that the mixed fluid ejection time is constant. Also from this point, the inner diameter of the storage tube should be 8 mm to 10 mm. I know that there is.
From the above, it is desirable to use a storage pipe having an inner diameter of 8 mm to 10 mm (a cross-sectional area is 2.5 to 4 times that of the water supply pipe) and a length of 550 mm to 750 mm.

本発明の金型冷却装置は、上記の実施形態に限定されない。たとえば、金型に穴を形成して冷却水を流し込み、金型を直接冷却するものであってもよい。また、実施例は三系統の冷却水経路を有するものであるが、系統数は、冷却対象となる金型の形状や大きさなどによって適宜増減できる。   The mold cooling apparatus of the present invention is not limited to the above embodiment. For example, a hole may be formed in the mold and cooling water may be poured to cool the mold directly. In addition, although the embodiment has three cooling water paths, the number of systems can be appropriately increased or decreased depending on the shape and size of the mold to be cooled.

本発明の金型冷却装置の全体図。1 is an overall view of a mold cooling device of the present invention. 給水管と貯留管の接続部分の断面図。Sectional drawing of the connection part of a water supply pipe and a storage pipe. 冷却部の断面図。Sectional drawing of a cooling unit. 貯留管の断面積、長さおよび貯留時間と水または混合流体の噴出時間との関係を示すグラフ。The graph which shows the relationship between the cross-sectional area of a storage pipe, length, and storage time, and the ejection time of water or a mixed fluid.

符号の説明Explanation of symbols

１ 冷却部
２ 水供給管
３ エア供給管
４ 合流部
５ 給水管
６ 貯留管
７ 排水管
８ 圧力計
Ａ 金型 DESCRIPTION OF SYMBOLS 1 Cooling part 2 Water supply pipe 3 Air supply pipe 4 Merge part 5 Water supply pipe 6 Storage pipe 7 Drain pipe 8 Pressure gauge A Mold

Claims (4)

金型（Ａ）に設けた冷却部（１）に水とエアを供給する金型冷却装置であって、
水供給管（２）と、エア供給管（３）と、両供給管（２，３）が合流する合流部（４）と、該合流部（４）と前記冷却部（１）とを接続する給水管（５）と、前記冷却部（１）から水とエアを排出する排水管（７）とを備え、
前記給水管（５）の途中一部を断面積の大きな貯留管（６）としてあり、該貯留管（６）の断面積が、上流側の前記給水管（５）の断面積の２．５倍〜４倍であり、
前記水供給管（２）から水を供給して前記貯留管（６）に水を貯留後、前記エア供給管（３）からエアを圧送して、初めに前記給水管（５）と前記貯留管（６）の水を前記冷却部（１）に噴出させ、その後水とエアの混合流体を噴出させることを特徴とする金型冷却装置。 A mold cooling device for supplying water and air to a cooling unit (1) provided in a mold (A),
A water supply pipe (2), an air supply pipe (3), a junction (4) where both supply pipes (2, 3) merge, and the junction (4) and the cooling section (1) are connected. A water supply pipe (5), and a drain pipe (7) for discharging water and air from the cooling section (1),
A part of the water supply pipe (5) is a storage pipe (6) having a large cross-sectional area, and the cross-sectional area of the storage pipe (6) is 2.5 of the cross-sectional area of the water supply pipe (5) on the upstream side. Twice to four times,
After water is supplied from the water supply pipe (2) and water is stored in the storage pipe (6), air is pumped from the air supply pipe (3), and first the water supply pipe (5) and the storage are stored. A mold cooling apparatus characterized in that water in a pipe (6) is ejected to the cooling section (1), and then a mixed fluid of water and air is ejected. 前記貯留管（６）の長さが５５０ｍｍ〜７５０ｍｍであることを特徴とする請求項１記載の金型冷却装置。   The mold cooling apparatus according to claim 1, wherein the length of the storage pipe (6) is 550 mm to 750 mm. 水を前記冷却部（１）に噴出させ、その後水とエアの混合流体を噴出させた後、さらに前記水供給管（２）および前記エア供給管（３）から水とエアを交互に供給して水とエアの混合流体を複数回噴出させることを特徴とする請求項１または２記載の金型冷却装置。   Water is ejected to the cooling unit (1), and then a mixed fluid of water and air is ejected, and then water and air are alternately supplied from the water supply pipe (2) and the air supply pipe (3). 3. A mold cooling apparatus according to claim 1, wherein a mixed fluid of water and air is ejected a plurality of times. 前記排水管（７）の途中に圧力計（８）が設けてあり、水を前記冷却部（１）に噴出させ、その後水とエアの混合流体の噴出が終了する前に、前記排水管（７）内の圧力を測定し、水および水とエアの混合流体の噴出異常を検出することを特徴とする請求項１、２または３記載の金型冷却装置。   A pressure gauge (8) is provided in the middle of the drain pipe (7), and water is ejected to the cooling section (1), and then the drain pipe ( 7) The mold cooling apparatus according to claim 1, 2 or 3, wherein the pressure inside is measured to detect abnormal ejection of water and a mixed fluid of water and air.
JP2008273366A 2008-10-23 2008-10-23 Mold cooling apparatus Pending JP2010099698A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016504197A (en) * 2012-12-21 2016-02-12 アルフィ エッセ．エッレ．エッレ． Mold fixture, especially casting mold cooling system
CN105750501A (en) * 2016-04-01 2016-07-13 河北盛跃铁路电气化器材有限公司 Waste mist generation device for metal mold casting forced cooling
JP2019022904A (en) * 2017-07-25 2019-02-14 リョービ株式会社 Metal mold cooling apparatus
JP2019181475A (en) * 2018-04-02 2019-10-24 株式会社デンソー Mold cooling device and mold cooling method
CN117415302A (en) * 2023-10-31 2024-01-19 广州市型腔模具制造有限公司 Die casting forming device for die casting manufacturing

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JPH1080758A (en) * 1996-09-09 1998-03-31 Ahresty Corp Device for cooling metallic mold
JP2003136188A (en) * 2001-10-31 2003-05-14 Ahresty Corp Die cooling apparatus
JP2005046846A (en) * 2003-07-29 2005-02-24 Dynamo:Kk Method and device for cooling die and the like in die casting
JP2008073722A (en) * 2006-09-21 2008-04-03 Ahresty Corp Die cooling method and cooling device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1080758A (en) * 1996-09-09 1998-03-31 Ahresty Corp Device for cooling metallic mold
JP2003136188A (en) * 2001-10-31 2003-05-14 Ahresty Corp Die cooling apparatus
JP2005046846A (en) * 2003-07-29 2005-02-24 Dynamo:Kk Method and device for cooling die and the like in die casting
JP2008073722A (en) * 2006-09-21 2008-04-03 Ahresty Corp Die cooling method and cooling device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016504197A (en) * 2012-12-21 2016-02-12 アルフィ エッセ．エッレ．エッレ． Mold fixture, especially casting mold cooling system
CN105750501A (en) * 2016-04-01 2016-07-13 河北盛跃铁路电气化器材有限公司 Waste mist generation device for metal mold casting forced cooling
JP2019022904A (en) * 2017-07-25 2019-02-14 リョービ株式会社 Metal mold cooling apparatus
JP2019181475A (en) * 2018-04-02 2019-10-24 株式会社デンソー Mold cooling device and mold cooling method
JP7151135B2 (en) 2018-04-02 2022-10-12 株式会社デンソー Mold cooling device and mold cooling method
CN117415302A (en) * 2023-10-31 2024-01-19 广州市型腔模具制造有限公司 Die casting forming device for die casting manufacturing

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